My Preventive Medicine Texts show Red Cedar, South African Boxwood, and Rosewood (Dalbergia) as a cause of airway disease. Each can cause chronic bronchitis with continued exposure.

(If you want the original source and have access to a medical library it was published by the American Thorasic Society in their "American Review of Respiratory Disease" Vol 108 p 1094 in 1973. The author was Chan-Yeung et.al.)

As you proceed with the fiberglassing, also be aware that the epoxy (esp the hardener) is also a sensitizer.

Rick